The original engine was lost when i found this 518he in south west of Finland near Turku. before i made the deal i had located a similar engine with two horse(s)power less. Im no electritian, but compared the electrics of the new engine to the old, it raised more questiones to me than it realy was as my electritian pal just got the micros switches to connect and wires and changed the solenid to a relay. And now works perfect. I was nervous it would leak oil from some of the hydralic lines as it was pretty oily and greasy when i bought it, it was probably only the old engines oil drain tube that was loose and had been so for a long time till it killed the engine i belive.